How long can it take for an allergic reaction to trazodone 50mg?

Husband started trazodone 50mg a month and a half ago. About two weeks ago he started having swelling of lips and chin. We narrowed it down to carrageenan an additive in coffee creamer ( he's never had a reaction before to coffee creamer before) gave him 10 ml benadryl swelling went away he'not drinking coffee creamer.now 2 weeks later his cheek and lip are slightly swollen again today gave him 10 ml of benadryl and muscle tighting in right arm for over a week.he's 67. Would it taken this long for an allergic reaction to happen. And why two weeks between swelling reactions

Responses (1)

I would contact the doctor because usually an allergic reaction would appear before that length of time. But you never know because our immune systems can react with those symptoms when trying to fight off something that doesn't agree within the body. Good luck!